Correlation between phospholipase A2 activity and intra‐Golgi protein transport reconstituted in a cell‐free system

Abstract
A wide variety of phospholipase A2 inhibitors blocks intra‐Golgi protein transport reconstituted in a cell‐free system. Phospholipase A2 activity detectable under the protein transport assay conditions is actually inhibited by the inhibitors. There is a good correlation between the inhibition of protein transport and that of phospholipase A2 activity. Prolactin secretion from GH3 cells is also blocked by a membrane‐permeable phospholipase A2, inhibitor, suggesting the physiological relevance to inhibition of protein transport in vitro by phospholipase A2 inhibitors.